Tube-number record
12AX7S
8 archive entries
BrandMazda Belvu
ClassDouble Triode
BaseNoval (B9A)
Filament12.6 V @ 150 mA
Construction
Primary TypeDual triode
EnvelopeA 22-2
Sections2
Filament / Heater
Heater NotesIndirect heating; series/parallel filament support
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation1.1 W
Grid 1 Voltage55 V
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Sécurité Cinq Etoiles
- Shock and vibration resistant
- Heater withstands 5,000 switching cycles
- Designed for aeronautical and industrial use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation - Triode Section | 100 V | 1250 | 80000 | 100 | 0.5 mA |
| Typical Operation - Triode Section | 250 V | 1600 | 62500 | 100 | 1.2 mA |
Datasheets
Datasheet: 12AX7S.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
